Mark great job as usual. Chatter is bounce, excessive movement caused by many things in the grinding process. Many of which you have mentioned. One of the things which is sometimes overlooked is the machine itself. Not that the bearing or shaft may be going but much simpler. The foundation or ways on the machine ways can cause problems. Recommend to touch the beaching base where it meets the foundation and you may find it bouncing. Adjust the floor mount,check wheel balance and table vibrations.
Hello Marc! Thank you for the video reply to my question and your valued instruction....very informative! FYI...going to watch this video a few times, write some notes and apply to my setup, technique, and practice.....I will update you with my results! Best regards Chuck
I agree: the Marcipedia of machining. I'm learning way more than I can use for now, but what a library resource for all time (which is something I would like more of). Thanks for the informative run through. Heck, I watched it and don't yet have a grinder.
Very thorough explanation of the grinding process. Thank you very much, Marc! :) I was wondering, is there a series of books you can refer me to, where I could learn the advanced stuff? I already own a few books about how to run a lathe and a milling machine, so I do have the basic knowledge of how they work and their operation, but I look to know more about machining operations. Thanks once again, Marc. Your videos are VERY helpful! :)
Marc, been ages since you posted this. What does one do if the manufacturer of their surface grinder is no longer in business and one is trying to determine the runout on the spindle? In addition, if one suspects that their spindle is out of spec, what does one do? Thanks! Love your presentations.
Thanks for all the information!! I just purchased a small surface grinder tonight. I can't remember where I recently saw it, but I thought I saw someone mention that you should advance the table almost the whole width of the wheel to keep the wear even. I take it that you don't believe in that method? P.S. I see the Expo67 liscense plate in the background. My parents drove their 1966 Ford Galaxy 500 up from Ohio to see that.
My parents and the family went to Expo 67 in our beige ford Galaxy 500. For the eight year old that I was, it was amazing. Thanks for the memory's your post scriptum brought back to me. Marc L'Ecuyer
Great job Marc. I have yet to try surface grinding and am looking for a grinding unit that will fit my needs. Thanks to your videos and the internet I feel I will be very well prepared when/if I do find my grinder....It's out there somewhere....maybe Chuck has it?? :-) Colin
Hi chuck, I have only ground aluminum once in my life. To obtain the required finish we had to pack the part in dry ice, making it denser and giving me the possibility of lifting a decent chip with a fine wheel. Grinding aluminum is not recommended. It is so prone to penetration that the loose grit embeds itself in the surface, its melting point is so low that the wheel gets packed up almost instantaneously and it is so soft that it wants to grab continuously. A really sharp cutting tool with a 50% mix of water and dish soap will probably give a more accurate cut and a better finish. Don't leave the water and soap on the machine since it will stain. Marc L'Ecuyer
You guessed right! Don't forget to dress the face as well as the diameter, I prefer feeding from the top down (small amounts at a time) as I cycle the table from side to side very rapidly, this reduces the pressure, the wear and the heat since this type of grinding can heat up a piece quickly. Thanks for watching and for the kind words in your other comment, Marc L'Ecuyer
As always GREAT! and Thanks! For our little toys, think 9" x 18" x .75 HP hobby lathe, there is a 'Tool Post Grinder' kit, my question is, can you actually get 'micron' mirror finishes? or stick to 180, 220, 300, 400 emery cloth passes? Stll learnin' Chazz
Hi Charles, if you have access to a good cylindrical grinder, maybe. But grinding attachments on small lathes should be used with medium grit wheels since there is often more play in the machine (bearings and xz axis) than the size of a single very fine abrasive grain. The cylindrical attachments however are good to have since, even if you can't get a ten thousands of an inch finish, they permit you to cut a hardened piece of steel to within one thousands of an inch and then, as you suggest, finish with fine emery cloth baked by a extra smooth flat file. Measure regularly with a well adjusted vernier micrometer and voila!!! If however all you are looking for is just a nice finish, you can just polish. I hope this helps and thanks for watching, Marc L'Ecuyer
thank you Marc, this vid needs some better spiders(google search ability), any one who just picked up a surface grinder needs to watch this for sure, especially the explination of the wheel designations, thats a big chunk to chew and digest. also what about diamond dresser sharpness? or should i rewatch tge balancing vid? anyways thanks agian for the knowledge!
hi good day could you check out this title on TH-cam to would be safe to set up a grinder this way "French Cleats on Steroids, make a workshop wall storage system"
Mark great job as usual. Chatter is bounce, excessive movement caused by many things in the grinding process. Many of which you have mentioned. One of the things which is sometimes overlooked is the machine itself. Not that the bearing or shaft may be going but much simpler. The foundation or ways on the machine ways can cause problems. Recommend to touch the beaching base where it meets the foundation and you may find it bouncing. Adjust the floor mount,check wheel balance and table vibrations.
Great suggestion MaPaZee, thanks for sharing it with everyone, Marc
Marc, you are a walking Wikipedia for tools... Marckipedia :-) Thanks for another superb instructional video.
Hello Marc!
Thank you for the video reply to my question and your valued instruction....very informative!
FYI...going to watch this video a few times, write some notes and apply to my setup, technique, and practice.....I will update you with my results!
Best regards
Chuck
I agree: the Marcipedia of machining. I'm learning way more than I can use for now, but what a library resource for all time (which is something I would like more of). Thanks for the informative run through. Heck, I watched it and don't yet have a grinder.
Very thorough explanation of the grinding process. Thank you very much, Marc! :) I was wondering, is there a series of books you can refer me to, where I could learn the advanced stuff? I already own a few books about how to run a lathe and a milling machine, so I do have the basic knowledge of how they work and their operation, but I look to know more about machining operations. Thanks once again, Marc. Your videos are VERY helpful! :)
Superb explanation of the grinding process.
Marc, been ages since you posted this. What does one do if the manufacturer of their surface grinder is no longer in business and one is trying to determine the runout on the spindle? In addition, if one suspects that their spindle is out of spec, what does one do? Thanks! Love your presentations.
Great presentation as always, Thank you !
You answered all the ? I needed and then some got a handful of wheels with my 612sg didn't know where to start got a good idea know .
Thanks for all the information!! I just purchased a small surface grinder tonight. I can't remember where I recently saw it, but I thought I saw someone mention that you should advance the table almost the whole width of the wheel to keep the wear even. I take it that you don't believe in that method?
P.S. I see the Expo67 liscense plate in the background. My parents drove their 1966 Ford Galaxy 500 up from Ohio to see that.
My parents and the family went to Expo 67 in our beige ford Galaxy 500. For the eight year old that I was, it was amazing. Thanks for the memory's your post scriptum brought back to me. Marc L'Ecuyer
I really enjoyed that and I don't even have a grinder!! Thanks!!!
Great job Marc. I have yet to try surface grinding and am looking for a grinding unit that will fit my needs. Thanks to your videos and the internet I feel I will be very well prepared when/if I do find my grinder....It's out there somewhere....maybe Chuck has it?? :-)
Colin
Marc,
Great video. Thanks for sharing your time and talent. What are your recommendations for precision grinding aluminum?
Thanks. Chuck.
Hi chuck, I have only ground aluminum once in my life. To obtain the required finish we had to pack the part in dry ice, making it denser and giving me the possibility of lifting a decent chip with a fine wheel. Grinding aluminum is not recommended. It is so prone to penetration that the loose grit embeds itself in the surface, its melting point is so low that the wheel gets packed up almost instantaneously and it is so soft that it wants to grab continuously. A really sharp cutting tool with a 50% mix of water and dish soap will probably give a more accurate cut and a better finish. Don't leave the water and soap on the machine since it will stain. Marc L'Ecuyer
Another great video Marc! I love your presentation style... Fred
Nice job.
Not many touch on the surface or cylindrical grinding subject.
Hi Marc, Very nice video. M.K.S.
What are the cupped type wheels used for ? I guess grinding the sides of parts ?
You guessed right! Don't forget to dress the face as well as the diameter, I prefer feeding from the top down (small amounts at a time) as I cycle the table from side to side very rapidly, this reduces the pressure, the wear and the heat since this type of grinding can heat up a piece quickly. Thanks for watching and for the kind words in your other comment, Marc L'Ecuyer
As always GREAT! and Thanks! For our little toys, think 9" x 18" x .75 HP hobby lathe, there is a 'Tool Post Grinder' kit, my question is, can you actually get 'micron' mirror finishes? or stick to 180, 220, 300, 400 emery cloth passes? Stll learnin' Chazz
Hi Charles, if you have access to a good cylindrical grinder, maybe. But grinding attachments on small lathes should be used with medium grit wheels since there is often more play in the machine (bearings and xz axis) than the size of a single very fine abrasive grain. The cylindrical attachments however are good to have since, even if you can't get a ten thousands of an inch finish, they permit you to cut a hardened piece of steel to within one thousands of an inch and then, as you suggest, finish with fine emery cloth baked by a extra smooth flat file. Measure regularly with a well adjusted vernier micrometer and voila!!! If however all you are looking for is just a nice finish, you can just polish. I hope this helps and thanks for watching, Marc L'Ecuyer
thank you Marc, this vid needs some better spiders(google search ability), any one who just picked up a surface grinder needs to watch this for sure, especially the explination of the wheel designations, thats a big chunk to chew and digest. also what about diamond dresser sharpness? or should i rewatch tge balancing vid?
anyways thanks agian for the knowledge!
hi good day could you check out this title on TH-cam to would be safe to set up a grinder this way "French Cleats on Steroids, make a workshop wall storage system"